Crystal Pond Dam Dam
Crystal Pond Dam
Crystal Pond Dam, located in Eastford, Connecticut, is a privately owned structure built in 1940 primarily for recreation purposes. With a height of 8 feet and a length of 150 feet, the dam holds a storage capacity of 1200 acre-feet, covering a surface area of 150.1 acres. The dam regulates the flow of Crystal Pond Brook and has a maximum discharge capacity of 73 cubic feet per second.
Managed by the Connecticut Department of Energy and Environmental Protection (DEEP), the dam is state-regulated, inspected, and enforced to ensure public safety and environmental protection. Despite being rated as having a significant hazard potential, the dam's condition assessment is listed as "Not Rated," indicating a need for further evaluation. The dam lacks an emergency action plan and updated inundation maps, suggesting room for improvement in risk management and emergency preparedness.
Named after the nearby Crystal Pond, this masonry dam serves as a recreational hotspot while also posing potential risks that require attention and proactive measures from regulatory agencies and dam owners. Enthusiasts of water resources and climate resilience should monitor developments regarding Crystal Pond Dam's safety and management to uphold its role in providing recreational opportunities while safeguarding surrounding communities and ecosystems.
Plan around the weather
Same NOAA / yr.no feed Snoflo's iOS app uses. Watch the precipitation column on the meteogram -- rain on the basin upstream typically lifts inflow 24-72 hours later.
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind. Each cell is colour-coded relative to the column min/max.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day temperature & precipitation
Daily temperatures, snow, and rain projected over the next two weeks.
Nearby streamflow gauges
USGS streamgauges around Crystal Pond Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Mount Hope River Near Warrenville | 4 cfs | → |
| Little River At Harrisville | 8 cfs | → |
| Quinebaug River At Putnam | 113 cfs | → |
| Quinebaug River At Quinebaug | 45 cfs | → |
| Quinebaug R At West Thompson | 142 cfs | → |
| Quinebaug R Bl Westville Dam Nr Southbridge | 37 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Crystal Pond Dam.
Boat launches
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Campgrounds
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Fishing spots
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River runs
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About Crystal Pond Dam
Where does the data for Crystal Pond Dam come from?
Structural and regulatory data come from the U.S. Army Corps of Engineers' National Inventory of Dams (NID). Weather forecast comes from NOAA / yr.no -- the same feed Snoflo's iOS app uses.
How often is the report updated?
NID structural data refreshes annually as the Corps publishes updated assessments. The weather forecast refreshes throughout the day.
What does the Significant hazard rating mean?
The Corps of Engineers' hazard potential classification grades probable consequences if the dam fails: High = probable loss of human life; Significant = no probable loss of human life but possible economic loss / environmental damage; Low = no probable loss of human life, only minor economic / environmental losses. See the Dam Data Reference card below for the full definitions.
What's "% of normal"?
The current storage value compared to the historical average storage on this calendar day. 100% = right on average; values above 100% mean above-normal storage (wet year); values below mean below-normal (dry year or drought).
Can I get alerts when storage crosses a threshold?
Yes -- alerts are managed in the Snoflo iOS app. Favorite this dam, set a threshold, and you'll get a push the moment conditions cross.
Dam data reference
Condition Assessment
- Satisfactory
- No existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
- Fair
- No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action.
- Poor
- A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency.
- Unsatisfactory
- A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
- Not Rated
- The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Hazard Potential Classification
- High
- Dams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
- Significant
- Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environmental damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
- Low
- Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
- Undetermined
- Dams for which a downstream hazard potential has not been designated or is not provided.